Hey guys and gals i have an 9" RT but he has open wounds on both sides just behind his gills like towards his body a bit almost looks like HITH but on his sides???? i got him for free from a felleo MFK'er and he said its getting better than it was but i dont want to put him in with my tank he is in a 40gal Rubbermaid with a heater and large airstone! i cant find out what is this cause and also can i use Melafix in tat container without a filter??? i have been doing 50% daily WC but the melafix bottle says to only chnage 25%WC on the 7th day. but i cant go that long with out a WC with no filter so what if i did 25% WC daily and just add 25% of a daily dose of melafix to replace that dosage that got changed out?????? he is very healthy minus this Thanks ----Mark